Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

mcs/class/WindowsBase/System.Collections.ObjectModel/ObservableCollection.cs

@@ -26,175 +26,8 @@
 //	Marek Safar (marek.safar@gmail.com)
 //
 
-#if NET_4_0
 
 using System.Collections.ObjectModel;
 using System.Runtime.CompilerServices;
 [assembly:TypeForwardedTo (typeof (ObservableCollection<>))]
 
-#else
-
-using System.Collections.Generic;
-using System.Collections.Specialized;
-using System.ComponentModel;
-
-namespace System.Collections.ObjectModel
-{
-	[Serializable]
-	public class ObservableCollection<T> : Collection<T>, INotifyCollectionChanged, INotifyPropertyChanged {
-		[Serializable]
-		sealed class SimpleMonitor : IDisposable {
-			private int _busyCount;
-
-			public SimpleMonitor()
-			{
-			}
-
-			public void Enter()
-			{
-				_busyCount++;
-			}
-
-			public void Dispose()
-			{
-				_busyCount--;
-			}
-
-			public bool Busy
-			{
-				get { return _busyCount > 0; }
-			}
-		}
-
-		private SimpleMonitor _monitor = new SimpleMonitor ();
-
-		public ObservableCollection()
-		{
-		}
-
-		public ObservableCollection(IEnumerable<T> collection)
-		{
-			if (collection == null)
-				throw new ArgumentNullException ("collection");
-
-			foreach (var item in collection)
-				Add (item);
-		}
-
-		public ObservableCollection(List<T> list)
-			: base (list != null ? new List<T> (list) : null)
-		{
-		}
-
-		[field:NonSerialized]
-		public virtual event NotifyCollectionChangedEventHandler CollectionChanged;
-		[field:NonSerialized]
-		protected virtual event PropertyChangedEventHandler PropertyChanged;
-
-		event PropertyChangedEventHandler INotifyPropertyChanged.PropertyChanged {
-			add { this.PropertyChanged += value; }
-			remove { this.PropertyChanged -= value; }
-		}
-
-		protected IDisposable BlockReentrancy ()
-		{
-			_monitor.Enter ();
-			return _monitor;
-		}
-
-		protected void CheckReentrancy ()
-		{
-			NotifyCollectionChangedEventHandler eh = CollectionChanged;
-
-			// Only have a problem if we have more than one event listener.
-			if (_monitor.Busy && eh != null && eh.GetInvocationList ().Length > 1)
-				throw new InvalidOperationException ("Cannot modify the collection while reentrancy is blocked.");
-		}
-
-		protected override void ClearItems ()
-		{
-			CheckReentrancy ();
-
-			base.ClearItems ();
-
-			OnCollectionChanged (new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Reset));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Count"));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Item[]"));
-		}
-
-		protected override void InsertItem (int index, T item)
-		{
-			CheckReentrancy ();
-
-			base.InsertItem (index, item);
-
-			OnCollectionChanged (new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Add, item, index));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Count"));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Item[]"));
-		}
-
-		public void Move (int oldIndex, int newIndex)
-		{
-			MoveItem (oldIndex, newIndex);
-		}
-
-		protected virtual void MoveItem (int oldIndex, int newIndex)
-		{
-			CheckReentrancy ();
-
-			T item = Items [oldIndex];
-			base.RemoveItem (oldIndex);
-			base.InsertItem (newIndex, item);
-
-			OnCollectionChanged (new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Move, item, newIndex, oldIndex));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Item[]"));
-		}
-
-		protected virtual void OnCollectionChanged (NotifyCollectionChangedEventArgs e)
-		{
-			NotifyCollectionChangedEventHandler eh = CollectionChanged;
-
-			if (eh != null) {
-				// Make sure that the invocation is done before the collection changes,
-				// Otherwise there's a chance of data corruption.
-				using (BlockReentrancy ()) {
-					eh (this, e);
-				}
-			}
-		}
-
-		protected virtual void OnPropertyChanged (PropertyChangedEventArgs e)
-		{
-			PropertyChangedEventHandler eh = PropertyChanged;
-
-			if (eh != null)
-				eh (this, e);
-		}
-
-		protected override void RemoveItem (int index)
-		{
-			CheckReentrancy ();
-
-			T item = Items [index];
-
-			base.RemoveItem (index);
-
-			OnCollectionChanged (new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Remove, item, index));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Count"));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Item[]"));
-		}
-
-		protected override void SetItem (int index, T item)
-		{
-			CheckReentrancy ();
-
-			T oldItem = Items [index];
-
-			base.SetItem (index, item);
-
-			OnCollectionChanged (new NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction.Replace, item, oldItem, index));
-			OnPropertyChanged (new PropertyChangedEventArgs ("Item[]"));
-		}
-	}
-}
-#endif